Measuring your ring size

Below you will find a guide to measure your ring size, however, if you feel unsure in any way, please contact us.

Measuring a ring you already own

1. Select a ring that properly fits the intended finger

2. Measure the INSIDE diameter of the ring

3. Match the measurement to the conversion chart to the right. If the ring falls between two sizes, we advise you to order the larger of the two sizes.

4. Please note: Rings with a particularly thick band will feel tighter than a thin band; in these cases, we recommend buying a full size larger than your normal ring size.

Measuring your ring finger

Your ring should fit your finger comfortably; it should be snug enough so that it will not fall off, but loose enough to slide over your knuckle.

Please note: Your finger size can change throughout the day, so it is a good idea to measure at the end of the day when your fingers are at their largest.

Do not measure when your hands are cold; your fingers will be at least half a size smaller.

Below you will find an international ring size guide where you can compare British ring sizes, with US ring sizes and those from France, Germany, Japan and Switzerland.

Please note this is a guide only and we recommend your getting your ring finger measured professionally – any local Jeweller will be happy to do this for you.

Below is the full International Ring Size Guide.

BritishUS SizeDiameter (inch)Diameter (mm)MetricFrench
3 1/414.2544.6
G3 3/814.3644.945 1/4
3 1/20.56914.4545.2
G 1/23 5/814.5645.6
H3 3/414.6545.946 1/2
H 1/240.58514.8646.5
I4 1/415.0447.147 3/4
I 1/24 1/20.60115.2747.8
J4 5/815.448.149
4 3/415.5348.4
J 1/250.61815.749
K5 1/815.849.350
5 1/415.949.6
K/125 3/81650
L5 1/20.63416.150.351 3/4
5 3/416.350.9
L 1/25 7/816.4151.3
M60.6516.5151.552 3/4
M 1/26 1/416.7152.2
N6 1/20.66616.9252.854
N 1/26 3/417.1353.4
O70.68317.355455 1/4
O 1/27 1/417.4554.7
P7 1/20.69917.7555.356 1/2
P 1/27 3/417.9755.9
Q80.71618.1956.657 3/4
Q 1/28 1/418.3557.2
8 1/20.73218.5357.8
R8 5/818.6158.459
8 3/418.6958.4
R 1/28 7/818.859
S9 1/819.159.460 1/4